189293491 has 4 divisors (see below), whose sum is σ = 189682672. Its totient is φ = 188904312.

The previous prime is 189293483. The next prime is 189293501. The reversal of 189293491 is 194392981.

It is a happy number.

189293491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194392981 = 43 ⋅4520767.

It is a cyclic number.

It is not a de Polignac number, because 189293491 - 2³ = 189293483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189293191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193860 + ... + 194833.

It is an arithmetic number, because the mean of its divisors is an integer number (47420668).

Almost surely, 2^189293491 is an apocalyptic number.

189293491 is a deficient number, since it is larger than the sum of its proper divisors (389181).

189293491 is an equidigital number, since it uses as much as digits as its factorization.

189293491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389180.

The product of its digits is 139968, while the sum is 46.

The square root of 189293491 is about 13758.3971086751. The cubic root of 189293491 is about 574.1762531012.

The spelling of 189293491 in words is "one hundred eighty-nine million, two hundred ninety-three thousand, four hundred ninety-one".